题目1179：阶乘-------------阶乘不用long long int 就不能AC

AC的代码:

#include<iostream>
using namespace std;
long long int fact(int m);
int main()
{int n;while(cin>>n){long long int sum1=0,sum2=0;if (n==0) break;int m,p;if (n%2==0)//n为偶数 
      {p=n;m=n-1;}else //n为奇数 
      {m=n;p=n-1; //    if (p==0) break;
      }int i,j;for (i=1;i<m+1;i=i+2)sum1+=fact(i);for (j=2;j<p+1;j=j+2)sum2+=fact(j);cout<<sum1<<" "<<sum2<<endl;     }    return 0;
}
long long int fact(int m)
{if (m==1) return 1;else return m*fact(m-1);
}